An overview of the US EPA Emissions Factor Source


The US Environmental Protection Agency publishes a variety of emissions factors across Scope 1, 2 and 3 with the majority of materials summarised under the EPA’s GHG Emission Factors Hub. The Hub draws from published material by the EPA and other governmental departments.

The Emissions Factor Hub is used widely by US based organisations voluntarily reporting on their emissions and is a key source in the proposed mandatory reporting frameworks.

The website for US EPA can be found here.
The website for US EPA can be found here.

Emissions Source Key Info

Full Source Name
The US Government Environmental Protection Agency
Sumday Concise Name
The US EPA publishes a range of Scope 1, 2 and 3 emissions factors which are updated regularly. The EFs are intended to for use by US based operations and draw from data and resource compiled by the US government.
Source Type
Government/ International Organisation
Most Recent Release Year
Earliest Release Year
Next Expected Release Date
Sumday Take
The US EPA emission factors are widely regarded as one of the most credible emission factor sources. The factors are used by US based operations to quantify their emissions and are often used in jurisdictions where the local government does not publish their own emissions factors. Despite being relatively comprehensive the US EPA lacks coverage of some emission categories such as leased assets and working from home. As a result these EFs may need to be supplemented with other data sources to prevent inventory gaps.

Summary of Related Datasets

Dataset Name
Dataset Last Update
Details coming soon!
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Last updated on October 29, 2023